SchodyTo calculation methodology

Core equations

• 2h+s: checked 60–65 cm range for internal stairs.
• Pitch = atan(rise/going).
• Stringer length = √(height² + run²).
• Headroom is calculated at the closed slab edge using a continuous stair line.

Profiles and regulations

Polish presets reflect dimensional limits in the current Polish technical conditions. The English version labels them as Poland presets and also provides a custom profile.

Official Polish regulation text

Rounding

The engine calculates with unrounded values while the interface usually displays 0.1 cm or 1 cm. Do not set out construction from rounded screen values alone.